In other words, Routers will not allow a broadcast from one LAN to cross the Router and reach another Network Segment. The primary function of a Router is to divide a big Broadcast domain to Multiple smaller Broadcast domain. Example: ARP Request message, DHCP DISCOVER Message ...
- Now local DHCP relay forwards a unicast DISCOVER packet to the DHCP server. When it receives the expected UNICAST OFFER response from DHCP server, it is supposed to change the bootp flag as broadcast and set the Broadcast IP as well in this OFFER packet. When this issue is present, the...
[BTRACE][2020/10/12 11:46:50][0][DHCPPRO][000c-2958-7ba7]:Broadcast packet within VLAN 12(pri:0) succeed! 广播发送OFFER成功。(单播发送OFFER时打印Unicast packet to interface100GE1/0/1within VLAN 12(pri:0) succeed。) [BTRACE][2020/10/12 11:46:50][0][DHCPPRO][000c-2958-7ba7]...
39311 bytes Unicast: 491, Multicast: 19 Broadcast: 37, Jumbo: 0 Discard: 0, Total Error: 0 CRC: 0, Giants: 0 Jabbers: 0, Throttles: 0 Runts: 0 Output: 600 packets, 49436 bytes Unicast: 599, Multicast: 0 Broadcast: 1, Jumbo: 0 Discard: 0, Total Error: 0 Collisions: 0, Ex...
Information carried in a DHCPDISCOVER message includes the client's MAC address (chaddr field), parameter request list (Option 55), and broadcast flag (flags field). Stage 2: Offer stage All the DHCP servers on the same network segment as the DHCP client receive the DHCPDISCOVER message. ...
单播(unicast)帧(一对一):收到的帧的 MAC 地址与本站的硬件地址相同 广播(broadcast)帧(一对全体):发送给本局域网上所有站点的帧 多播(multicast)帧(一对多):发送给本局域网上一部分站点的帧网络层IP(Internet Protocol,网际协议)是为计算机网络相互连接进行通信而设计的协议。 ARP(Address Resolution Protocol,地...
In the following figure, authorized and unauthorized DHCP servers can receive DHCP Discover messages broadcast by DHCP clients. DHCP client sending DHCP Discover messages If a bogus DHCP server sends a bogus DHCP Reply message with an incorrect gateway address, Domain Name System (DNS) server addres...
单播(unicast)帧(一对一):收到的帧的 MAC 地址与本站的硬件地址相同 广播(broadcast)帧(一对全体):发送给本局域网上所有站点的帧 多播(multicast)帧(一对多):发送给本局域网上一部分站点的帧网络层IP(Internet Protocol,网际协议)是为计算机网络相互连接进行通信而设计的协议。 ARP(Address Resolution Protocol,地...
DHCP relay agent Either a host or an IP router that listens for DHCP client messages being broadcast on a subnet and then forwards those DHCP messages directly to a configured DHCP server. The DHCP server sends DHCP response messages directly back to the DHCP relay agent, which then forwar...
As the Windows 7 client starts, it sends a DHCP-REQUEST or DHCP-DISCOVER packet together with a Broadcast Flag of 0. Then, the DHCP server responds with a Unicast DHCP-ACK or DHCP-OFFER packet. This response is dropped by the boot-time firewall policy. ...